Who needs a license?

All corporations, joint stock associations, and limited liability companies (LLCs) that offer engineering or land surveying services must have a certificate of authorization in Washington, except for professional service (PS) corporations and professional service limited liability companies (PLLCs).

Frequently asked questions

I work for a Canadian firm with several engineers licensed in Canada. Can we apply for a certificate of authority without having an engineer licensed in Washington State?
No, the designated engineer must be a licensed professional engineer in Washington.